MANUFACTURER REFERENCE

GMC code references — Page 4.

Read the source definition and confirm the exact vehicle, reporting module and diagnostic procedure.

Buick / Cadillac +4

Oil Level Lamp Control Circuit

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Buick / Cadillac +4

Service Throttle Soon Lamp Control Circuit

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Buick / Cadillac +4

EVAP Purge Solenoid Control Circuit

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Buick / Cadillac +4

Driver 2 Line 6

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Buick / Cadillac +4

1-4 Upshift Solenoid Control Circuit

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Buick / Cadillac +4

Starter Enable Relay Control Circuit

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Buick / Cadillac +4

Cooling Fans Control Circuit

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Buick / Cadillac +4

MIL Control Circuit

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Buick / Cadillac +4

Cruise Control Inhibit Control Circuit

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Buick / Cadillac +4

Oil Life Lamp Control Circuit

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Buick / Cadillac +4

1-4 Upshift Lamp Control Circuit

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Buick / Cadillac +4

Driver 3 Line 5

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Buick / Cadillac +4

Driver 3 Line 6

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Buick / Cadillac +4

Reverse Inhibit Solenoid Control Circuit

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Buick / Cadillac +4

ABS Unit Expected

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Buick / Cadillac +4

Driver 4 Line 1

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Buick / Cadillac +4

Low Engine Oil Level Lamp Control Circuit

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Buick / Cadillac +4

Engine Hot Lamp Control Circuit

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Buick / Cadillac +4

Tachometer Control Circuit

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Buick / Cadillac +4

EVAP Vent Solenoid Control Circuit

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Buick / Cadillac +4

Driver 4 Line 6

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Buick / Cadillac +4

Driver 4 Line 7

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Buick / Cadillac +4

Driver 5 Line 1

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Buick / Cadillac +4

Driver 5 Line 2

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Buick / Cadillac +4

Driver 5 Line 3

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Buick / Cadillac +4

Driver 5 Line 4

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Buick / Cadillac +4

Driver 5 Line 5

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Buick / Cadillac +4

Driver 5 Line 6

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Buick / Cadillac +4

Driver 5 Line 7

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Buick / Cadillac +4

Delivered Torque Circuit Fault

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Buick / Cadillac +4

ECM Loop Overrun

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Buick / Cadillac +3

Coolant Gage Circuit Low Voltage

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Buick / Cadillac +3

Coolant Gage Circuit High Voltage

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Buick / Cadillac +4

Tachometer Circuit Low Voltage

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Cadillac / Chevrolet +2

Tachometer Circuit High Voltage

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Buick / Cadillac +3

Remote Keyless Entry Circuit Low

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Buick / Cadillac +3

Remote Keyless Entry Voltage High

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Buick / Cadillac +4

Transmission MIL Request

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Buick / Cadillac +4

Transmission MIL Request Circuit

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Buick / Cadillac +4

P/N Signal Output Circuit

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Buick / Cadillac +4

Transmission Torque Reduction Request Circuit

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Buick / Cadillac +4

TP Signal From ECM

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Buick / Cadillac +4

ECM Supply Voltage Interrupted

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Buick / Cadillac +4

Engine Torque Delivered To TCM Signal

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Cadillac / Chevrolet +2

Park/Neutral Position (PNP) Switch Circuit Engine Torque Signal Circuit

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Buick / Cadillac +4

Transmission Control Module Checksum

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Buick / Cadillac +4

Transmission Control Module Loop

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Buick / Cadillac +4

Transmission Control Module Reprogrammable Memory

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Buick / Cadillac +4

Transmission Control Module Stack Overrun

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Buick / Cadillac +4

CAN Bus Throttle Body Position

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Buick / Cadillac +4

TCM Power Control Relay Circuit Open

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Buick / Cadillac +4

Performance Selector Switch Failure

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Buick / Cadillac +4

Ground Control Relay

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Buick / Cadillac +4

TFP Valve Position Switch Circuit

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Buick / Cadillac +4

Maximum Adapt And Long Shift

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Buick / Cadillac +4

Transmission Over Temperature Condition

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Buick / Cadillac +4

Torque Control

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Buick / Cadillac +4

Torque Converter Overstressed

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Buick / Cadillac +4

Transmission Range Switch Start In Wrong Range

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Buick / Cadillac +4

TFP Valve Position Switch Park/Neutral With Drive Ratio

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Buick / Cadillac +4

TFP Valve Position Switch Reverse With Drive Ratio

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Buick / Cadillac +4

TFP Valve Position Switch Drive Without Drive Ratio

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Cadillac / Chevrolet +2

Internal Mode Switch No Start Wrong Range

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Buick / Cadillac +4

Internal Mode Switch Circuit A Low

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Buick / Cadillac +4

Internal Mode Switch Circuit B High

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Buick / Cadillac +4

Internal Mode Switch Circuit P Low

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Buick / Cadillac +4

Internal Mode Switch Illegal Range

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Buick / Cadillac +4

Internal Mode Switch Circuit C High

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Buick / Cadillac +4

PC Solenoid Power Circuit Low Voltage

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Buick / Cadillac +4

A/T Solenoids Power Circuit Low Voltage

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Buick / Cadillac +4

Kick-Down Switch

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Buick / Cadillac +4

Kick-Down Switch Failed Open

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Buick / Cadillac +4

Kick-Down Switch Failed Short

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Buick / Cadillac +4

1-2 Shift Solenoid Circuit Low Voltage

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Buick / Cadillac +4

1-2 Shift Solenoid Circuit High Voltage

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Buick / Cadillac +4

Torque Reduction Signal Circuit Desired By TCM

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Buick / Cadillac +4

Transmission Gear Ratio Output Circuit

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Buick / Cadillac +4

2-3 Shift Solenoid Circuit High Voltage

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Buick / Cadillac +4

Brake Band Apply Solenoid Circuit

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Buick / Cadillac +4

Brake Band Apply Solenoid Performance

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Buick / Cadillac +4

Brake Band Apply Solenoid Low Voltage

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Buick / Cadillac +4

Brake Band Apply Solenoid High Voltage

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Buick / Cadillac +4

TCC PWM Solenoid Circuit Electrical

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Buick / Cadillac +4

Torque Converter Clutch Circuit

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Buick / Cadillac +4

Transmission Fluid Life

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Buick / Cadillac +4

Transmission Component Slipping

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Buick / Cadillac +4

TCC Stator Temp. Switch Circuit Low

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Buick / Cadillac +4

TCC Stator Temp. Switch Circuit High

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Buick / Cadillac +4

4WD Low Switch Circuit

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Buick / Cadillac +4

TCC Enable/Shift Light Circuit

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Buick / Cadillac +4

Shift Timing Solenoid

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Buick / Cadillac +4

TCC Release Switch Circuit

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Buick / Cadillac +4

ECM Data Input Circuit

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Buick / Cadillac +4

Throttle Position Sensor PWM Signal Low

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Buick / Cadillac +4

Throttle Position Sensor PWM Signal High

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Buick / Cadillac +4

Engine Torque Signal Low Voltage

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Buick / Cadillac +4

Engine Torque Signal High Voltage

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Buick / Cadillac +4

TCM To ECM Torque Reduction Circuit

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These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.